<script type="module">
	{
		var target = {a:1, b:2};
		
		var source1 = {b:20, c:3, m:4};
		var source2 = {c:30, e:8, g:10};

		Object.assign(target, source1, source2);
		
		document.write(`属性简写：${JSON.stringify(target)}<br><br>`);
	}
</script>